# Public Passenger Vehicles Act 1981, Paragraph 2


(1) Regulations may provide that where an authorised person has reason to believe that a public service vehicle adapted to carry more than 8 passengers is being, or has been, used on a road in contravention of section 12(1) of this Act, the person may detain the vehicle and its contents.
(2) Regulations made by virtue of sub-paragraph (1) above may not authorise a person other than a constable in uniform to stop a vehicle on any road.

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Source: https://www.legislation.gov.uk/ukpga/1981/14/schedule/2A/paragraph/2 (the official version)
Page: https://openlegislation.uk/public-passenger-vehicles-act-1981/schedule-2A/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.